Gas range oven



.Dec. 21, 1%43. T. E. PHARES GAS RANGE OVEN Filed Aug. 2, 1940 NVENTOZia/v4: 51 mm: .5,

Patented Dec. 21, 1943 UNITED STATES PATENT orrlca GAS RANGE OVEN ThomasE. Phares', .Shelbyville, 11111., assignor t1;

Chambers Corporation, Shelbyville, Ind., a corporation 01' IndianaApplication August 2, 1940, Serial No. 349,439

4 Claims.

My invention relates to gas-range ovens, and more specifically to ovensof the type which have insulated walls and which are provided withventilation-control means that ventilate the-oven when the burner is inoperation and shut ofi ventilation after the burner hasbeen turned off.

It is the object of my invention to produce an- .improved oven burnerwhich will supply heat er near one corner thereof. In the bottom wall ofthe oven, below the burner, and in one side wall of the oven above theburner, I provide air-admission and air-outlet openings respectively,such openings being controlled by jointly operable valve members. .Theyopening in the bottom wall of the oven is disposed within the limits ofthe central opening in the rectangular burner, and the valve memberassociated therewith is in the form of a plate which, when raised topermit the entrance of air into the oven, occupies a substantiallyhorizontal position within the burner and serves as a deflectorcontrolling the supply of secondary air to the burner ports.

The accompanying drawing illustrates my invention, Fig. 1 being avertical section through an oven on the line I-i of Fig. 2, and Fig. 2

being a horizontal section on the line 2-2 of.

Fig.1.

As shown in the drawing, the oven is formed with vertical side walls 10,a rearwall II, a top wall 12, and a bottom wall l3, all of which areinsulated. A door l4, mounted inthe front wall of the oven, providesaccess thereto; and, at about the level of the lower edge of the door H,the oven is provided with a floor member I5 spaced in the conventionalmanner from the side and rear walls of the oven to provide for theupward flow of hot gases from the burner I6, which is supported from thebottom wall 13 of the oven beneath the floor member [5.

As will be clear from Fig. 2, the burner is in the form of a rectanglehaving a. central opening 5 provided with an air-admission opening 30,

and a peripheral gas-passage communicating with a peripheral series ofburner ports 20. The burner I6 is supplied witha combustible mixture ofgas'and primary air through a mixture-con- I duit 2| which may be formedintegral with the burner and which extends from an opening in oneof theside walls l0 across the oven in front of the burner, communicating withthe latter near the remote front corner thereof. At its point ofcommunication with the burner, the conduit 2| curves and flares asindicated at 22, the outer curved wall smoothly joining the outer wallof the bumer-passage at the remote side of the burner and the innercurved wall of the passage being curved through approximately 180 and"smoothly joining the front wall of the front stretch of theburner-passage.

At the rear corner of the burner, in rear of the point at which thefiared'end 22 of the conduit is joined thereto, the inner wall of theburner passage is curved on a relatively large radius as indicated at23,, while the outer wall forms substantially a right-angle. As aresult, the cross-sectional area of the burner passage at the 'corneropposite the point where it joins the mixture passage 2| is ofsubstantially enlarged crosssectional area. Aside from this one corner,the cross-sectional area of the burnerpassage is substantially uniform.This construction, with the mixture passage 2| extending across the ovenin front of the burner, permits that passage to have the necessaryminimum length between the air bell 24 and the burner, while the flaredend portion 22 of the mixture passage and the curved inner wall 23 ofthe burner passage at the rear corner provides an even distribution ofgas and primary air throughout the peripheral series of burner ports 20.

The burner I6 is supported at a distance above the bottom wall l3 of theoven by brackets 25 and 26 at the rear and front of the burnerrespectively. Beneath the large central opening in the burner, thebottom wall l3 of the oven is which, as shown, is round in shape. Therear 1 wall ll of the oven is provided with an airdischarge opening 3!,the lower edge of which is near the level of the floor-member iii.

For the purpose of controlling ventilation of the oven, I associatewith'the air admission opening 30 a valve member 32, which, as shown, isa circular disk somewhat larger in diameter than the air-admissionopening. This disk is movable between the dotted-line position shown inFig. l, in which it covers the opening 30 and prevents indicated at36,when the valve 32 is open. The valve 36. is provided with a centralopening through which there passes loosely a screw 31,

-, such screw extending into and being rigid with the horizontal endportion 36 of the valve-support 35; As will be obvious from Fig, l, thescrew 31 does not clamp the valve member 32 to the end portion 33 of thevalve-support.

Desirably, the air outlet opening 3| has associated with it a valvemember 40, which is jointly operable with the valve member 32, bothsuchvalvemembers conveniently being operated jointly-with the valve 4|which controls the sup- I ply of gas to the burner l6. To this end,there may be mounted rigid with the rotatable handle 42 which controlsthe valve 4| a disk 43 which, at an eccentric point, has an openingforthe reception of one end of a link 44. The link 44 extends downwardlyand has its lower end connected to one arm of a bell crank 45 rigid with'theishaft '34. The other end of the bell crank 45 is connected by alink 45 to a crank 41 rigid with a shaft 48 tojwhich the valve member 40,is secured, v

When the valve is closed, and the burner I8 is not operating, the valvemembers 32 and 40 occupy the dotted-line positions illustrated in Fig.1, such valve members closing the openings with which they arerelatively associated and preventing the flow of air through the oven.

When, however, the valve 4| is open, the link 44 moves upward and rocksthe shaft 34 and the valve-support 35 rigid therewith in a clockwiseposition to lift the valve 32 to the full-line position illustrated inFig. 1. Simultaneously, because of the interconnection provided by thelink 46, the shaft 48 is rocked to open the valvemember 40. With bothvalve members open, air enters the over through the opening 33 andleaves through the opening 3|, 9. portion of such air being used assecondary air for the burner l3. When the handle 48 is operated to closethe gas valve 4|, the two valve members 32 and will be restored to thedotted-line positions, the valve member 32 being seated by the force ofgravity.

To provide the proper distribution of secondary air through the burnerI6, I find it desirableio locate the opening 30 somewhat rears wardly,or towardthe air-outlet opening 3|, from I also find it the center ofthe burner l6. vantageous to arrange the valve-support 35, so that thevalve member 32 when in open posi tion will be displaced forwardly, oraway from the air-outlet opening 3|, with respect to the air-admissionopening 30. The described locations of the air-admission opening 30 andof tl'i open valve member 32 provide for the burner ports 20 adistribution of secondary air which will result in substantially uniformcombustion.

I claim as my invention:

1. In a gas range, an oven, a burner disposed within said oven and nearthe bottom thereof, said burner being generally rectangular in shape andhaving a relatively large, generally rectangular central opening and aperipheral gas passage surrounding said opening, said burner having aperipheral series of burner ports communicating with said passage, thebottom wall of said oven being provided with an air admission openingdisposed under the central opening in the burner but displaced from thecenter thereof toward one of the vertical walls of the oven, such wallbeing provided with an air-outlet opening, and means for controlling theflow of air through the oven, said means comprising a plate adapted tooverlie and close said air admission opening and mechanism for raisingsaid plate and supporting it above the bottom wall of the oven andwithin the central opening of the burner to act as; a deflector of thesecondary air required';for combustion at, said burner ports.

2. In a; gas range, an oven, a burner disposed within said oven and nearthe bottom thereof,

said burner being generally rectangular in shape 1 and having arelatively large, generally rectangular central openingand a peripheralgas passage surrounding said opening, said burner having a peripheralseries of burner ports communicating with said passage, the bottom wallof said oven being provided with an air admission opening disposed underthe central opening in the burner, said oven also being provided with anair-outlet opening, and means for controlling the fiow of air throughthe oven, said means comprising a plate adapted to overlie and closesaid air admission opening and mechanism 'for raising said plate andsupporting it above the bottom wall of the oven and within the centralopening of the burner to act as a deflector of the secondary airrequired for combustion at said burner ports.

3. The invention set forth in claim 2 with the addition that saidmechanism is so proportioned that when holding said plate in raisedposition the plate and opening will be oppositely eccentric relative tothe axis of the central opening in the burner.

- 4. In a gas range, an oven, a burner disposed within said oven andnear the bottom thereof, said burner being generally rectangular inshape and having a relatively large, generally rectangular centralopening and a peripheral gas passage surrounding said opening, saidburner having a peripheral series of burner ports communicating withsaid passage, the bottom wall of said oven being provided with an airadmission opening disposed under the central opening in the burner, andan air-deflecting member disposed in a substantially horizontal positionwithin the central opening of said burner, said air admission openingand said deflecting member being substantially circular and oppositelyeccentric relative to the axis of the central burner opening.

THOMAS E. PHARES.

